Java tutorial
/* * FCKeditor - The text editor for Internet - http://www.fckeditor.net Copyright (C) 2004-2010 Frederico Caldeira Knabben == BEGIN LICENSE == Licensed under the terms of any of the following licenses * at your choice: - GNU General Public License Version 2 or later (the "GPL") http://www.gnu.org/licenses/gpl.html - GNU Lesser General Public License Version 2.1 or later (the "LGPL") * http://www.gnu.org/licenses/lgpl.html - Mozilla Public License Version 1.1 or later (the "MPL") http://www.mozilla.org/MPL/MPL-1.1.html == END LICENSE == */ package com.hightern.fckeditor.connector.impl; import java.io.File; import java.io.FileFilter; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.util.ArrayList; import java.util.Arrays; import java.util.HashMap; import java.util.List; import java.util.Map; import javax.servlet.ServletContext; import org.apache.commons.io.IOUtils; import org.apache.commons.io.filefilter.DirectoryFileFilter; import org.apache.commons.io.filefilter.FileFileFilter; import com.hightern.fckeditor.connector.Connector; import com.hightern.fckeditor.connector.exception.FolderAlreadyExistsException; import com.hightern.fckeditor.connector.exception.InvalidCurrentFolderException; import com.hightern.fckeditor.connector.exception.InvalidNewFolderNameException; import com.hightern.fckeditor.connector.exception.WriteException; import com.hightern.fckeditor.handlers.RequestCycleHandler; import com.hightern.fckeditor.handlers.ResourceType; import com.hightern.fckeditor.requestcycle.ThreadLocalData; import com.hightern.fckeditor.requestcycle.UserPathBuilder; import com.hightern.fckeditor.tool.UtilsFile; /** * Abstract local filesystem backend connector. This class is the default implementation of the <a href="http://docs.fckeditor.net/FCKeditor_2.x/Developers_Guide/Server_Side_Integration" * target="_blank">official connector specification</a>. * <p> * It serves files and folders against a specific local directory which is resolved in a subclass. You cannot use this class directly, instead you have to subclass it and implement the abstract * methods and override methods if necessary. * * @version $Id: AbstractLocalFileSystemConnector.java 4785 2009-12-21 20:10:28Z mosipov $ */ public abstract class AbstractLocalFileSystemConnector implements Connector { protected ServletContext servletContext; public String fileUpload(final ResourceType type, final String currentFolder, final String fileName, final InputStream inputStream) throws InvalidCurrentFolderException, WriteException { final String absolutePath = getRealUserFilesAbsolutePath( RequestCycleHandler.getUserFilesAbsolutePath(ThreadLocalData.getRequest())); final File typeDir = AbstractLocalFileSystemConnector.getOrCreateResourceTypeDir(absolutePath, type); final File currentDir = new File(typeDir, currentFolder); if (!currentDir.exists() || !currentDir.isDirectory()) { throw new InvalidCurrentFolderException(); } final File newFile = new File(currentDir, fileName); final File fileToSave = UtilsFile.getUniqueFile(newFile.getAbsoluteFile()); try { IOUtils.copyLarge(inputStream, new FileOutputStream(fileToSave)); } catch (final IOException e) { throw new WriteException(); } return fileToSave.getName(); } public void createFolder(final ResourceType type, final String currentFolder, final String newFolder) throws InvalidCurrentFolderException, InvalidNewFolderNameException, FolderAlreadyExistsException { final String absolutePath = getRealUserFilesAbsolutePath( RequestCycleHandler.getUserFilesAbsolutePath(ThreadLocalData.getRequest())); final File typeDir = AbstractLocalFileSystemConnector.getOrCreateResourceTypeDir(absolutePath, type); final File currentDir = new File(typeDir, currentFolder); if (!currentDir.exists() || !currentDir.isDirectory()) { throw new InvalidCurrentFolderException(); } final File newDir = new File(currentDir, newFolder); if (newDir.exists()) { throw new FolderAlreadyExistsException(); } if (!newDir.mkdir()) { throw new InvalidNewFolderNameException(); } } public List<Map<String, Object>> getFiles(ResourceType type, String currentFolder) throws InvalidCurrentFolderException { final String absolutePath = getRealUserFilesAbsolutePath( RequestCycleHandler.getUserFilesAbsolutePath(ThreadLocalData.getRequest())); final File typeDir = AbstractLocalFileSystemConnector.getOrCreateResourceTypeDir(absolutePath, type); final File currentDir = new File(typeDir, currentFolder); if (!currentDir.exists() || !currentDir.isDirectory()) { throw new InvalidCurrentFolderException(); } // collect files List<Map<String, Object>> files; Map<String, Object> fileMap; final File[] fileList = currentDir.listFiles((FileFilter) FileFileFilter.FILE); files = new ArrayList<Map<String, Object>>(fileList.length); for (final File file : fileList) { fileMap = new HashMap<String, Object>(2); fileMap.put(Connector.KEY_NAME, file.getName()); fileMap.put(Connector.KEY_SIZE, file.length()); files.add(fileMap); } return files; } public List<String> getFolders(final ResourceType type, final String currentFolder) throws InvalidCurrentFolderException { final String absolutePath = getRealUserFilesAbsolutePath( RequestCycleHandler.getUserFilesAbsolutePath(ThreadLocalData.getRequest())); final File typeDir = AbstractLocalFileSystemConnector.getOrCreateResourceTypeDir(absolutePath, type); final File currentDir = new File(typeDir, currentFolder); if (!currentDir.exists() || !currentDir.isDirectory()) { throw new InvalidCurrentFolderException(); } final String[] fileList = currentDir.list(DirectoryFileFilter.DIRECTORY); return Arrays.asList(fileList); } /** * Resolves a provided userfiles absolute path against a specific backend. The is no restriction how to resolve the path. To keep it simple, you may use * {@link UserPathBuilder#getUserFilesAbsolutePath(javax.servlet.http.HttpServletRequest) UserPathBuilder.getUserFilesAbsolutePath}. The return value has to be consistent within the entire * request cycle. * * @param userFilesAbsolutePath * the userfiles absolute path to resolve against a specific backend * @return the resolved userfiles absolute path */ protected abstract String getRealUserFilesAbsolutePath(String userFilesAbsolutePath); /** * Returns a file reference to a created resource type directory. The directory will be created only if it does not exist. * * @param baseDir * the current resource type's base directory * @param type * the current resource type * @return a file reference the resource type directory */ protected static File getOrCreateResourceTypeDir(final String baseDir, final ResourceType type) { final File dir = new File(baseDir, type.getPath()); if (!dir.exists()) { dir.mkdirs(); } return dir; } }